header {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	padding: 20px 0;
	text-align: center;
	background: #eee;
	z-index: 9999;
	transition: all 300ms ease-in-out;
}

.scroll-down {
	header {
		transform: translate3d(0, -100%, 0);
	}
}

.scroll-up {
	header {
		filter: drop-shadow(0 -10px 20px rgb(170, 170, 170));
	}
}

.menu-is-open {
	overflow: hidden;

	header {
		filter: none;
	}
}

body {
	padding-bottom: 10000%;
	background-image: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="36" height="72" viewBox="0 0 36 72"%3E%3Cg fill-rule="evenodd"%3E%3Cg fill="%239C92AC" fill-opacity="0.4"%3E%3Cpath d="M2 6h12L8 18 2 6zm18 36h12l-6 12-6-12z"/%3E%3C/g%3E%3C/g%3E%3C/svg%3E');
}
